turboplanner

.....freckles undedr that make up and clan't land a wheelless Drifter with no clothes on like Turbo can. In his arrival in Johannesburg, the Africaans version of the CASA Ramp Checker walked up  He was the size of a bull (not THE bull) with a head just as big." Muuve oaver thir aht of the texiwy" he ordered
"How can I do that without any wheels" said Turbo.

"Failure to du Tekorf Chicks, farn 1000 Rend" said the official, end yur hend brarke's orf, farn 1000 Rend."

"But that's not the hand brake" wailed Turbo who by now was getting sunburnt.

"Stend Op und walk thes wahy" said the official.

"Where ..........................................."

Well the RAA members voted for the people who've come up with this.

.......do the leakdown test on all the cylinders and a piston had leaked out of one if the exhaust stubs.

But, he soldiered on, threw over his man bag, pens, cigars, RMW boots, clothes, but not his sunglasses; he'd die for his WWII in the Pacific sunglasses. He even leaned down, holding the harness and undid the nuts holding the wheels on, then threw the seats overboard until the Drifter reached an equlibrium and charged on. He dropped down under the trees out of the radar, and eventually dropped it for a three point landing, one of the points being his nose, in ..............

".......Iam innocentski",  "I had poor upbringing, had to eat stray cats", "I lived next top a drug addict" - the usual things that got around convictions, but the winning phrase was "I fly DIFTER" The supporting judges broke into smiles but it wasn't all over, the Chief Judge said "Prove it" and a Drifter was wheeled out. Turbo, dressed in his tight suit, old boy's tie minus the white hanky appeared to reluctantly climb in missing his footing three times, puting his harness on crossed, saying loudly "How do you start these things", and it had to be started for him. The Chief judge started to gloat but without paying attention to a leakdown test Turbo jammed the throttle wide open made a shot takeoff run and headed for ..............................

1 hour ago, RFguy said:

What kills Jabiru's is people flying with bad leakdowns

From RAA official publications - TTIS failures

155

280

382

320

358

310

260

197

40

285

300

196

8

and at least two flying home from a factory rebuild so <6

22 hours ago, RFguy said:

I dunno.  Some users I know have done alot of work  with different main jets.  Jabiru have fiddled with the jet sizes from the beginnning of time....

too lean and you will cook something, for sure  IE beyond exhaust valve sustained capability at WOT .  Too rich and  the chambers etc will tend to cake up more, and also power will be left on the table if too rich... bore and ring wear can increase also since the fuel dissolves the lubricant. 

I am no expert or even have much experience with knowing how much main jet size different will affect WOT EGTs by how much. But others have that knowledge. 

I dont like to see any more than 680C under any weather condition at WOT.

 

Range: We would set the main jet size above your too lean and below your too rich; below the loss of power point.

These pistons, designed by GM for cars, are designed for intermittant power mode. In an aircraft application they are in constant power mode. So we have a compromise, but it's the base we have to work on.

The mounting point of aluminium is 660.3 degrees C.

The Combustion chamber temperature is 2000 degrees C

Without some intervention the aluminium is going to melt

EGT doesn't measure Combustion temperature

CGT doesn't measure Combustion temperature

You could graph the three temperatures but EGT and CGT would show up as a very gentle bell curve from start up to shut down whereas Combustion temperature would show up as a graph full of almost vertical lines up and down.

Not terribly usable.

Steel has a much higher melting point, yet you can ge both pistons and valves burnt away.

It comes down to how long does it take for aluminium/steel to melt, and can the piston/valve be cooled faster? 

It can, by the incoming fuel that hasn't been combusted yet.

On a constant power application like a tractor, outboard boat motor or aircraft, you wouldn't be looking to set the main jets at the smaller end of the scale.

Can you meaure the combustion temperature?   Yes you can, (reasonably) I use spark plug ceramic to measure the working range of combustion temperatures.

There is a range of colours which shows us when the main jet is too small all the way up to too big. (I don't have one but you'll find them on racing engine sites.)

We are looking for a honey brown ceramic for maximum power/cooling and might set to a slightly darker brown.

However, there's a catch; the colour charts are based on operation at WOT  long enough to colour the plugs then instant switch off/clutch in so the plug isn't masked during the normal intermediate jet, idle jet phase.

So you aren't going to be able to get the reading in a WOT climb in an aircraft without some masking.

4 hours ago, jackc said:

Subject says it all 😞  Our regulators and peak bodies are holding us back, when will they let go of their Egos and progress Aviation in Australia?  

 

https://inspire.eaa.org/youth/

You're 40 years too lateThis was the lifeblood of the AUF. Today you'll see them syuck on poles and roofs up the East Coast. There's one at Benalla and one at Holbrook. The people grew out of them; too many limitations - weather, short distance nowhere to go after a while, then along came things like the Skyfox that looked like a real plane and we were hooked. 

The grass might look greener, but you are facing the same problem as a lot of entry level sports. The younger people want to go for the premium class from day one. There's a parallell in race cars where you can burn off a set of Hoosier race tyres at $250 each in a night's racing, putting it beyond family reach, but no one will race in the same cars with road tyres costing $150 which last two seasons.

.............Squatters Tuckerbag Rag,

The audience seemed a bit confused, as if they'd paid their money to see the ballet "Snow White"  and were being treated to a punk rock performance, so Tubro quickly hacked some leaves from the CWA floral arrangements, raced out and syphoned a litre of fuel from the nearest car, threw a match and they had a Welcome to Country, Smoking Ceremony and hole in the hall floor all in one.

The General ...........

................interfering with a fire hose.

The real general was typical of the growing trend to make money merely by identifying as a Native Stockman.

They were doing it all over Australia, including plenty of females and the other alphabets.

They all said they'd been taught to ride a horse  by the great Far Lap who was know to be an expert in cattle wrangling.

As soon as they were given a job for life on the Station they immediately banned the handling of cattle, and flying the Station Cessna, which .......................

7 hours ago, turboplanner said:

I'll have the notes filed somewhere, will post them when I find them.

 

Haven't filed it - typical after the emergency was fixed, didn't matter, but it will again next time so I'll check through paperwork.

2 minutes ago, onetrack said:

Is this an older Honda? Some of the earlier vehicle models had this problem, but 99% of vehicles today don't have the problem because they have a backup battery built into the ECU.

 

The Diamond DA62 crash appears to be more related to incorrect wiring for the FADEC unit. The Farcebook post doesn't say if this was from the factory, or if it was due to recent maintenance.

I don't see how the Honda problem (lack of an ECU backup battery) relates to the DA62 problems.

Scratch that post - specifically related to the latest models and a deprival of power.

I'll have the notes filed somewhere, will post them when I find them.

12 minutes ago, onetrack said:

Manufacturer-branded oils are a con. The oils are refined and supplied by oil companies, and they simply put it in manufacturer-branded containers.

There's any amount of oil-company-branded oils that are produced to manufacturers specifications for the various engines and transmissions, that are finicky about their oil type or oil additives.

There are differences between the various oil company oils, as regards performance. I have personally found Penrite oil products to be superior to some other brands.

 

I wouldn't say they're a con in all cases. I've been involved on the inside in some engine issues where the solution was a specific mix and procedure, which is why I said to ask the manufacturer.

One example was the Nissan Navara engine reputed to be a dog, and costing some people thousands in blown turbos etc. Special oil required to cope with the under-sized gallery was cheaper by thousands.

1 minute ago, onetrack said:

I don't recall this previous posting. What is the problem with Honda electrics, when you carry out a battery swap?

You'll have to search back for the exact procedure because I'm suffering brain fade at present, but after two or three battery outlets refused to install a new bettery for me I found that a special procedure was required which ensured that 12v power was not lost during the changeover and Supercheap and Autobarn didn't have the electronic equipment (or weren't prepared to completely reboot and reprogramme the electronic unit from ground zero. Being resourceful I bought a battery from an on site RACV van and casually asked the technician to fit it, making notes of the sequence.

11 minutes ago, Thruster88 said:

🤔

https://www.facebook.com/100063068507532/posts/pfbid0siQ89AFqjxQmVdEuM9Njs5EpYZeH9khZ6Fs4hcWaCsHkVBAUxqrvoU13GQqYpnGUl/

Hmmmmmm 

I think I posted how you can't turn the engine off in a current Honda, take the battery out, then put a new one in becaise it's all too late - roughly similar reasons.

......visit his seamstress who flew a Yak 9  with real machine guns [avref]. Cappy gradually coaxed the Russian General towards the open window. a Ukrainian hit squad stood silently below. Just as they were about to fire .............

Cappy and Young Turbo here showing te standard they achieved which could have led to a successful dancing career.

3 hours ago, Geoff_H said:

A little off topic but in line with doing our own maintenance.  Got a message from the car saying that I needed to add 1 litre of oil to the engine.  So I looked up the owners book.  It said that oil specification was on page 366.  Only problem is that page 366 has never been bound into the book.  The next page says to buy oil from BMW.  Is this allowed to happen under state Law?

I'm only guessing here, but common rail injection pumps operate at nearly 30,000 psi; enough pressure to kill you if you use techniques like cracking the injectors to prime the system. There are other differences from the old days, and the manufacturers often solve their problems with cocktails of synthetic oil. So in some cases if they say use BMW oil type X, that's the one that doesn't cost you a $3500 turbo at regular intervals. I've also seen use Honda XXXX or a YYYY specification oil, or you can talk to BMW Service and see whether they recommend alternative oils which meet a certain standard. They usually want to keep you driving new BMWs, so they don't want turbo failuresso they're sitting on a razor blade no matter what they say.

.....ski. Not many people know that Moorabbin these days is populated mainly by Ukrainian refugees forced to  save themselves from the wildly inaccurate Russian artillery that seemed to accidentally hit hospitals, homes and latte shops rather than military targets, so when Turbo innocently announced that a Russian General was coming to stay, they said they’d roll out the welcome m.......

...try to aim for the enemy rather than your foot which you wil note is bleeding.

"Nyet!"< said the General, but he was too late...........................

....a Russian General who was asking, complete with his hat with the bright red band, and his fluoro safety gear.

As we know the Ukrainians liked to pop off Russian Generals using the 50 cals they got from China cheap.

Just at this moment he had zeroed the 50 cal in on Canopy, but someone farted and he missed and hot the General.

The Russians didn't see the funny side and ...............

5 hours ago, RFguy said:

I have come to a conclusion that the best engine combo for J230, 160, 170 all of them....is etc.

 

What do you think about the main jet size?

"...........be meeting Alboski and Snake Charmer to talksky about more Bushmasters!"

"OKsky" said the soldier and turned his weapon on the three Russian conscripts who had been scrounding among the many turretless tanks looking for cans of baked beans.

No one on board that day has ever been able to explain what motivated Cappy to yell "We'll have them!!!!!!" then yelled "PULL!" forgetting he wasn't on the Kapooka clay target range, then shoving the nose down steeply and ..................

........straight into the Donbas. "Get Outski!" a Ukranian soldier yelled up at the kitten which was right in his line of fire..............

........the Kitten so he gave it full throttle and 22 horsepower pushed him in the back and soon his V1 app told him it was time to rotate, which he did. His inclinometer app then kicked in telling him the angle to climb, and he soon found the magneta line after chucking Ipad 1 down on the floor, trying to boot up Ipad 2, finding its battery was flat, reaching down and grabbing Ipad one, pulling out of the near ring-over, and just managing to switch on his ADSB in time to avoind a collision with a Trike. The magenta line didn't look quite right; ...................

...quatre. Unfortunately Captain has taken us into an area where we  can't explain what this is, but let's say it's not singing.

Turbo explained to the CASA operative that he was conducting a normal landing when his aircraft was caught by a willy willy [an excused which Foxhunter had used successfully for 47 years including his days on 747s on the Hong Kong run where you had to bounce the mains off a rock to make Final] then a fence had jumped out and he crashed. He made promises to be good forever, and said he'd clean up the mess (and the aircraft bits), and the nice CASA man let him go.

Now in his brand new 2/3 scale Sopwith Kitten, he was lining up for take off.........................................